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Biological Assets and Inventory - Schedule of Sensitivity Analysis for Impacts on Value of Assets (Detail) - Sensitivity Analysis [Member] - CAD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2018 | Dec. 31, 2017
Net Selling price per gram [member] |  |
Disclosure Of Significant Unobservable Inputs Used In Fair Value Measurement Of Assets [Line Items] |  |
Increase (decrease) of Input, Biological assets | $ (673) | $ (227)
Increase (decrease) of Input, Inventory | (640) | (443)
Harvest yield per plant [member] |  |
Disclosure Of Significant Unobservable Inputs Used In Fair Value Measurement Of Assets [Line Items] |  |
Increase (decrease) of Input, Biological assets | (446) | (181)
Stage of growth [member] |  |
Disclosure Of Significant Unobservable Inputs Used In Fair Value Measurement Of Assets [Line Items] |  |
Increase (decrease) of Input, Biological assets | (446) | (181)
Processing costs per gram [member] |  |
Disclosure Of Significant Unobservable Inputs Used In Fair Value Measurement Of Assets [Line Items] |  |
Increase (decrease) of Input, Biological assets | 175 | 22
Increase (decrease) of Input, Inventory | 65 | 9
Selling costs per gram [member] |  |
Disclosure Of Significant Unobservable Inputs Used In Fair Value Measurement Of Assets [Line Items] |  |
Increase (decrease) of Input, Biological assets | 52 | 227
Increase (decrease) of Input, Inventory | 50 | 443
Equivalency factor [member] |  |
Disclosure Of Significant Unobservable Inputs Used In Fair Value Measurement Of Assets [Line Items] |  |
Increase (decrease) of Input, Biological assets | (45) | (1)
Increase (decrease) of Input, Inventory | 104 | $ (17)
Mass multipliers [member] |  |
Disclosure Of Significant Unobservable Inputs Used In Fair Value Measurement Of Assets [Line Items] |  |
Increase (decrease) of Input, Biological assets | (5) |
Increase (decrease) of Input, Inventory | $ (24) |

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- Definition The increase (decrease) in biological assets. [Refer: Biological assets] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 41 -IssueDate 2017-01-01 -Paragraph 50 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=41&date=2017-03-01&anchor=para_50&doctype=Standard -URIDate 2017-03-09 + Details
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- Definition The decrease (increase) in inventories of finished goods and work in progress. [Refer: Inventories; Current finished goods; Current work in progress] + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Name IAS -Number 1 -IssueDate 2017-01-01 -Paragraph 102 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2017-03-01&anchor=para_102&doctype=Standard -URIDate 2017-03-09 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2017-01-01 -Paragraph 99 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2017-03-01&anchor=para_99&doctype=Standard -URIDate 2017-03-09 + Details
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